a single gt pump flows slightly less than stock twin cobras,add a bap and it must out flow them(the best would be twin gt's). the advantage lies in the tank itself.
Yes I have heard the svt is more of a drop in than the gt.I just put the gt pump in mine and it was not hard at all,drill holes in basket,convert to spade term.(I upgraded to 12 ga) and run 5/16 hose from pump to hat(gates 27903).
have you paid attention to what the "double connection" does on the top of the pump? it actually bleeds pressure/flow off the pump to aid in filling the basket(probably the reason some people don't see the results they expect from just swapping in a svt),the only way to correct this is to run a line straight to hat,might as well run the gt pump. some of us don't have the available funds to just throw that kind of money in a fuel system(cobra tank ,twin gt's and fpdm's) when a gt pump will do it just fine,just can't get in boost below1/4 tank,no biggie for me